CVE-2025-70123 – Free5GC UPF Denial of Service Protocol Compliance Vulnerability

CVE ID : CVE-2025-70123

Published : Feb. 13, 2026, 5:16 p.m. | 1 hour, 13 minutes ago

Description : An improper input validation and protocol compliance vulnerability in free5GC v4.0.1 allows remote attackers to cause a denial of service. The UPF incorrectly accepts a malformed PFCP Association Setup Request, violating 3GPP TS 29.244. This places the UPF in an inconsistent state where a subsequent valid PFCP Session Establishment Request triggers a cascading failure, disrupting the SMF connection and causing service degradation.

Severity: 0.0 | NA

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